fault indicator prod guide - please select a · pdf fileurd cable mounted fault indicators aid...

Product GuideProtection and Control

VOLTAGE AND FAULT INDICATORS

• Advanced AccQTrip™ Design Improves Accuracy, Performance and Reliability

• 5kV thru 35kV Rated for Underground and Overhead System Applications

• Easily Installed Test Point or Cable Clamp Mounting Styles

• Compact, Sealed, Corrosion Resistant Construction With Provision for Hotstick Installation and Operation

• Accurate Voltage and Phase Indicators

• Fault Indicators Include Choice of: – Voltage or Time Reset – Mechanical Flag or Flashing LED Display

• Units are Self Powered and Feature Automatic Trip and Reset Functions

• Exceeds ANSI/IEEE 495-1986

®


FEATURE

AccQTrip™ “Off The Trip”Logic Circuitry

AccQClamp™ Self AdjustingMounting Provision

Voltage and/or TimeReset Fault Indicators

High/Low TripSetting Selection

Inrush Restraint Circuitry

Internal AdjacentPhase Shielding

1 mSec. Trip Response Time

Universal StyleFault Indicators

Quality ManufacturingProcesses

BENEFIT/DESCRIPTION

Prevents false tripping due to transient current surges or system overloading.

No need for customer to specify cable O.D. when ordering cable mount FCI’s. The AccQClamp™ maintains 10% trip accuracy over the entire clamping range (.4”-2.2”), and is composed of U.V. stable polycarbonate, stainless steel reinforced materials.

Eliminates false resetting and false tripping associated with current (reset) dependent FCI’s. Ideal for use on lightly loaded circuits where sufficient current may not be available to reliably energize a current reset type fault indicator. Automatic reset upon restoration of system voltage and/or time reset after 4 hours.

Coordinates FCI’s with current limiting fuses. No minimum load current requirements and no load surveys needed.

Coordinates FCI’s with circuit breaker or auto reclosure operation, avoiding mis-indication due to inrush currents.

Prevents electro-magnetic interference from adjacent phase conductors.

Coordinates FCI’s with current limiting fuses, and other protective devices.

Reduces part numbers and inventory, simplifying the application and ordering process.

Manufactured using state-of-the-art surface mount technology, and premium quality electronic components, for the highest degree of performance and reliability. All fault indicators meet or exceed ANSI/IEEE Standard 495-1986.

Fault Indicators reduce outage duration by quickly pinpointing the location of the fault. As shown in the

circuit diagram, the fault is located between the last tripped indicator and the first untripped indicator. Once identified, this section is switched to become

the new open point, allowing full service restoration to the rest of the customers during repairs.

BLOWN FUSEAT RISER POLE

CABLEFAULT

OPENPOINT

FAULTED CIRCUIT

INDICATOR SHOWINGFAULTED CIRCUIT DISPLAY

UNFAULTED CIRCUIT

INDICATOR SHOWINGNORMAL CIRCUIT DISPLAY

UNDERGROUND LOOP CIRCUIT WITH ELBOW CONNECTED TRANSFORMERS T1 THRU T7

T1 T2 T3 T4 T5 T6 T7

Protection and Control ProductsNowadays electric power underground distribution systems demand high performance in the form of improved reliability, improved power quality, reduced operational and maintenance costs, and flexibility of operation. These can be accomplished by sectionalizing feeders, installing equipment with minimal maintenance/installation costs, installing protection and/or automatic source transfer equipment, and providing ways to monitor the system and quickly locate a fault.

Thomas & Betts’ Elastimold® Voltage and Fault Indicators aid in the location and isolation of the faulted cable or equipment in overhead and underground distribution systems through 35kV. This product guide details the different types of faulted circuit indicators, voltage indicators, and phase indicators. With a complete line of elbow test point mount and cable mount indicators, you will find the best product to meet your system’s performance needs.

2

AccQTrip™ LOGIC OPERATION

Faulted Circuit Operationt1 – Fault Indicator is connected to the system and powers up. At 5kV, this takes 3 min. in the case of the test point mounted unit, and 6 min. in the case of the overhead type unit. At higher voltages the power up time is shorter.t2 – Fault current is detected. Fault Indicator is Armed after 1ms. Fault Indicator display shows Normal.t3 – Breaker/recloser trips open and voltage drops.t4 – Voltage is lost. A 30 second time window allows for the protective device to clear the fault, and reclose. If the fault persists the Fault Indicator shows Fault.

Overloading Operationt1 – Fault Indicator is connected to the system and powers up. At 5kV, this takes 3 min. in the case of the test point mounted unit, and 6 min. in the case of the overhead type unit. At higher voltages the power up time is shorter.t2 – Device downline from Fault Indicator switches creating an overload. Fault Indicator is Armed after 1ms. Fault Indicator display shows Normal.t3 – More than 100ms without voltage loss. Fault Indicator does not change state.t4 – After 30 sec. Fault Indicator goes back to initialized state.

Inrush Restraint Operationt1 – Fault Indicator is connected to the system and powers up. At 5kV, this takes 3 min. in the case of the test point mounted unit, and 6 min. in the case of the overhead type unit. At higher voltages the power up time is shorter.t1 - t2 – Upline recloser / breaker operation due to fault on another phase. After 100ms (t2) the Fault Indicator is disabled because there is no fault current detected.t3 – Recloser closes back. Voltage is back to normal. Unfaulted phases see Inrush. No change in Fault Indicator.

3

TEST POINT MOUNTED FAULT INDICATORS

TPM Series

Test Point

Test Point Mounting Provision

Provision for Hotstick Installation and Removal

Faulted Circuit Display

Standard Features

n AccQTrip™ Logic Circuitry Prevents false indications due to inrush currents, cold load pickup, and overloading

n High/Low Trip Setting Selection No minimum load current requirement, and no load surveys needed.

n Inrush Restraint Avoids misindication

n Internal Magnetic Shielding Prevents adjacent phase effects

n Trip Response .001 Seconds Coordinates with current limiting fuses, as well as other protection devices

n Magnetically Latched Flag Indication Flag Indication will not change state due to shock or vibration

n Light Weight, Compact and Sealed

Test Point Mounted Fault Indicators provide a clear, visual means for locating faulted cables and equipment on underground distribution systems. Indicators are self-powered and consist of a solid state current sensor connected to a faulted circuit display. Designs incorporate advanced circuit logic, monitoring system protection operation and preventing indicator tripping unless an overcurrent condition is followed by a loss of system voltage. Trip and reset operations are automatic and the same indicator may be used for 5KV thru 35KV applications.

Units are designed to mount directly to 200 & 600 Amp elbows, splices and other cable accessory components equipped with IEEE 386 Standard capacitive test points. Indicators include a universal mounting provision allowing installation on test point products as manufactured by Elastimold and others.

Designs feature compact, shielded and sealed, corrosion resistant construction. The indicator is enclosed in a rugged, impact resistant Lexan housing and includes an EPDM molded rubber, test point mounting boot. A built-in pulling eye allows for easy hotstick installation and removal of the indicator from the test point.

Basic OperationA faulted circuit produces an associated magnetic field which closes a reed switch in the indicator resulting in a tripped display. Trip response occurs in .001 seconds allowing the fault indicator to properly coordinate with all types of circuit protection schemes including current limiting fuses.

To eliminate confusing false trips, indicators are equipped with inrush, overload and cold load pick up restraint circuitry as standard. Current sensors are constructed with internal shielding to prevent inadvertent tripping when located in close proximity to adjacent phases, such as junction mounted applications.

TPM

Model TPMVF

Model TPMVL

4

TEST POINT MOUNTED FAULT INDICATORS

TPM Series

Specifications for TPM Voltage Reset, Flag Display: Model TPMVF

Nominal Trip RatingsResponse TimeSensor Indication Time Delay 1

Maximum Surge LevelEffect of Adjacent PhaseInrush Restraint ResponseLoad Current RequirementsDisplay TypeMinimum Reset VoltageVoltage Reset Time Power SourceTemperature RangeHousing Material

Weight

Low, 400 Amp; High, 800 Amp1mS.001--30 Sec. Subsequent To Arming25kA 10 Cycles 60 HzInternal Shielding Prevents Adjacent Phase Effects100mS (Disable Delay)NoneMechanical Flag5KV (Beginning Initializing Sequence)3 Minutes @ 5KVVolt Test Point Powered-40ºC To +85ºCMounting Boot--EPDM Conductive RubberHousing Body--UV StabilizedPolycarbonate Polymer258 Grams

Specifications for TPM Voltage Reset, LED Display: Model TPMVL

Nominal Trip RatingsTrip Response TimeFault Clearing Time 1

Maximum Surge LevelEffect of Adjacent PhaseInrush Restraint ResponseLoad Current RequirementsPower Up RequirementDisplay TypeFlash RateLED Display Time Voltage Reset Time Power Source 3

Battery CapacityBattery Operating LifeBattery Storage LifeTemperature RangeHousing Material

Weight

Low, 400 Amp; High, 800 Amp1mS.001--30 Sec. Subsequent To Arming25kA 10 Cycles 60 HzInternal Shielding Prevents Adjacent Phase Effects100mS (Disable Delay)None3 Minutes @ 5kVFlashing Super Bright LED30 Flashes per Minute4 Hour--Standard 3 Minutes @ 5kV3.6 volt Lithium Thyonil Chloride Cell2.4 Ah1200 Flash Hours Minimum15-20 Years-40ºC To +85ºCMounting Boot--EPDM Conductive RubberHousing Body--UV StabilizedPolycarbonate Polymer258 Grams

Specifications for TPM Time Reset, LED Display: Model TPMTL 2

Nominal Trip RatingsTrip Response TimeMaximum Surge LevelEffect of Adjacent PhasePower Up RequirementDisplay TypeFlash RateReset TimePower Source 3


Weight

Low, 400 Amp; High, 800 Amp1mS25ka 10 Cycles 60 HzInternal Shielding Prevents Adjacent Phase EffectsNoneFlashing Super Bright LED30 Flashes per Minute4 Hour--Standard3.6 volt Lithium Thyonil Chloride Cell2.4 Ah1200 Flash Hours Minimum15-20 Years-40ºC To +85ºCMounting Boot--EPDM Conductive RubberHousing Body--UV StabilizedPolycarbonate Polymer258 Grams

DIMENSIONS

Footnotes1) Prevents false trips due to short time interruptions without loss of voltage.

2) Inrush restraint is standard on voltage reset models. It is not available on time reset models.

3) Cell powers LED and it is active only when LED is ON. Lithium Thyonil Chloride Cells provide accurate indication throughout the entire temperature range.

5

URD CABLE MOUNTED FAULT INDICATORS

UCM Series

Standard Features

n AccQClamp™ Mounting Provision Universal one-size-fits-all design automatically adjusts

n High/Low Trip Setting Selection No minimum load current requirement, and no load surveys needed.



URD Cable Mounted Fault Indicators aid in locating faulted cables and equipment on underground distribution systems. Indicators are self powered and consist of a solid state current sensor connected to faulted circuit display.Units are designed for direct installation to an underground power cable using a spring loaded, over center toggle clamp mounting provision. The clamp accommodates cables ranging from .4 to 2.2 inches in diameter and includes retainer pads to prevent slip and twist. The clamp positions the cable conductor at a constant distance from the current sensor, maintaining indicator trip accuracy over the entire range of cable sizes.

Designs feature compact, shielded and sealed, corrosion resistant construction. The indicator is enclosed in a durable, impact resistant Lexan housing and includes a built-in pulling eye for easy hotstickinstallation and removal from the cable.


URD Cable Mounted Fault Indicators are constructed with an internally shielded current sensor that prevents inadvertent tripping when located in close proximity to adjacent phases, such as junction mounted applications.


Spring Loaded Mounting Clamps


UCM

Model UCMTL

6

URD CABLE MOUNTED FAULT INDICATORS

UCM Series

TYPICAL INSTALLATIONAs shown below, proper installation of URD Cable Mounted Fault Indicators requires routing cable neutral wires to prevent the ground return from affecting trip accuracy. Similar procedures should be followed for tape, wire, LC or other types of shielded cable constructions.

Install Fault Indicator in Area Shown

Specifications for UCM Time Reset, LED Display: Model UCMTL

Nominal Trip RatingsTrip Response TimeMaximum Surge LevelEffect of Adjacent PhaseDisplay TypeFlash RateReset TimePower Source1


Weight

Low, 400 Amp; High, 800 Amp1mS25ka 10 Cycles 60 HzInternal Shielding Prevents Adjacent Phase EffectsFlashing Super Bright LED30 Flashes per Minute4 Hour--Standard3.6 volt Lithium Thyonil Chloride Cell2.4 Ah1,200 Flash Hours Minimum15-20 Years-40ºC To +85ºCMounting Boot--EPDM Conductive RubberHousing Body--UV StabilizedPolycarbonate Polymer258 Grams

DIMENSIONS

Fig. 1 Fig. 2 Fig. 3 Fig. 4

Time/Current Curve for UCM, TL

Do not install indicator directly over the concentric neutral to avoid misindication (Fig. 4)

*

* Recommended

* *

INCORRECT

7

Footnote1) Cell powers LED and it is active only when LED is ON. Lithium Thyonil Chloride Cells provide accurate indication throughout the entire temperature range.

OVERHEAD LINE MOUNTED FAULT INDICATORS

OLM Series

Standard Features

n AccQTrip™ Logic Circuitry Prevents false indications due to inrush currents, cold load pickup, and overloading

n AccQClamp™ Mounting Provision Universal one-size-fits-all design automatically adjusts

n High/Low Trip Setting Selection No minimum load current requirement, and no load surveys needed



n Magnetically Latched Flag Indication Flag Indication will not change states due to shock or vibration

n Light Weight, Compact and Sealed

Overhead Line Fault Indicators aid in locating faulted circuits and equipment on overhead distribution systems. Indicators are self powered and consist of a solid state current sensor connected to a faulted circuit display. Designs incorporate advanced circuit logic, monitoring system protection operation and prevent indicator tripping unless an overcurrent condition is followed by a loss of system voltage. Trip and reset operations are automatic and the same indicator may be used for 5KV thru 35KV applications.

Units are designed for direct installation to the overhead line using a spring loaded, over center, toggle clamp mounting provision. The clamp accommodates conductors ranging from .4 to 2.2 inches in diameter and includes retainer pads to prevent slip and twist. The clamp positions the conductor at a constant distance from the current sensor, maintaining indicator trip accuracy over the entire range of conductors.

Designs are compact, sealed and corrosion resistant.


To eliminate confusing false trips, indicators are equipped with inrush, overload and cold load pick up restraint circuitry as standard. Current sensors are constructed with internal shielding to prevent inadvertent tripping when located in close proximity to adjacent phases.


Spring Loaded Mounting Clamps


Model OLMTL

OLM

Model OLMVF

Model OLMVL

8

OVERHEAD LINE MOUNTED FAULT INDICATORS

OLM Series

Specifications for OLM Voltage Reset, Flag Display: Model OLMVF


Maximum Surge LevelEffect of Adjacent PhaseInrush Restraint ResponseLoad Current RequirementsDisplay TypeMinimum Reset VoltageVoltage Reset TimeTemperature RangeHousing Material

Weight

Low, 400 Amp; High, 800 Amp1mS.001--30 Sec. Subsequent To Arming25kA 10 Cycles 60 HzInternal Shielding Prevents Adjacent Phase Effects100mSNoneMechanical Flag5KV6 Minutes @ 5KV-40ºC To +85ºCMounting Boot--EPDM Conductive RubberHousing Body--UV StabilizedPolycarbonate Polymer258 Grams

DIMENSIONS

Fault Indicators

Specifications for OLM Voltage Reset, LED Display: Model OLMVL


Maximum Surge LevelEffect of Adjacent PhaseInrush Restraint ResponseLoad Current RequirementsDisplay TypeFlash RateLED Display TimeVoltage Reset TimePower Source 3


Weight

Low, 400 Amp; High, 800 Amp1mS.001--30 Sec. Subsequent To Arming25kA 10 Cycles 60 HzInternal Shielding Prevents Adjacent Phase Effects100mSNoneFlashing Super Bright LED30 Flashes per Minute4 Hour--Standard6 Minutes @ 5kV3.6 volt Lithium Thyonil Chloride Cell2.4 Ah1,200 Flash Hours Minimum15-20 Years-40ºC To +85ºCMounting Boot--EPDM Conductive RubberHousing Body--UV StabilizedPolycarbonate Polymer258 Grams

Specifications for OLM Time Reset, LED Display: Model OLMTL 2

Nominal Trip RatingsTrip Response TimeMaximum Surge LevelEffect of Adjacent PhasePower Up RequirementDisplay TypeFlash RateReset TimePower Source 3


Weight

Low, 400 Amp; High, 800 Amp1mS25ka 10 Cycles 60 HzInternal Shielding Prevents Adjacent Phase EffectsNoneFlashing Super Bright LED30 Flashes per Minute4 Hour--Standard3.6 volt Lithium Thyonil Chloride Cell2.4 Ah1200 Flash Hours Minimum15-20 Years-40ºC To +85ºCMounting Boot--EPDM Conductive RubberHousing Body--UV StabilizedPolycarbonate Polymer258 Grams

Time/Current Curve for OLMVF, VL, TL

Footnotes1) Prevents false trips due to short time interruptions without loss of voltage.

2) Inrush restraint is standard on voltage reset models. It is not available on time reset models.

3) Cell powers LED and it is active only when LED is ON. Lithium Thyonil Chloride Cells provide accurate indication throughout the entire temperature range.

9

TEST POINT MOUNTED NEON VOLTAGE INDICATORS

V2 Series

Test Point Mounted Neon Voltage Indicators provide a convenient, visual method for determining the energized status of underground distribution circuits. The indicator consists of a self-powered voltage sensor connected to a neon light that flashes when energized. Flash rate is proportional to the system voltage and the same indicator may be used for 5KV thru 35KV applications.

Units are designed to mount directly to 200 & 600 Amp elbows, splices and other cable accessory components equipped with IEEE 386 Standard capacitive test points. Indicators include a universal mounting provision allowing installation on test point products as manufactured by Elastimold and others.

Designs feature compact, shielded and sealed, corrosion resistant construction. The indicator is enclosed in a durable EPDM molded rubber housing and includes a built-in pulling eye for easy hotstick installation and removal of the indicator from the test point.

DIMENSIONS

Ordering InformationTo order a Test Point Mounted Neon Voltage Indicator: Specify Catalog Number V2.

Test Point

Test Point Mounting Provision

EPDM Molded Rubber Housing

Flashing Neon Light Indicates Energized Status


Voltage Flash Rate

5KV 20 10KV 40 15KV 70 20KV 100 25KV 140 30KV 160 35KV 180

Self Powered Flashing Neon DisplayElastimold Voltage Indicators are self powered from the test point and are provided with a 20-year, long life neon bulb. A reflective background surrounds the bulb to provide increased brightness. Flash rate per minute is proportional to the phase to phase system voltage with output as follows:

V2

10

PD35 Series

PHASE & VOLTAGE INDICATOR TEST TOOL

Non-Metered Probe

Universal End Fitting Attachment to Hotstick

Black Ground Lead with Plug In Connection to Metered Probe and Clip On Connection to Ground

Metered Probe

Red Phase Lead with Plug In Connections between Metered Probe and Non-Metered Probe

Elbow Connectors with Test Point Provisions

Standard FeaturesUsed for determining the correct phasing and energized status of single and three phase underground distribution circuits, rated 5KV thru 35KV. The unit has been specifically designed for use on 200 & 600 Amp elbows, splices and other cable accessory components equipped with IEEE 386 Standard capacitive test points. The tool eliminates direct exposure to high voltage while using established indirect test methods for capacitance-coupled, cable connection test points.

The Phase & Voltage Indicator is designed for hotstick operation and includes universal end fittings for convenient mounting to existing hotsticks. The unit is lightweight, portable and self-powered by a built-in, replaceable, standard 9-volt battery. The tool features rugged, impact resistant construction and easily readable LED indicator lights. Advanced low impedance, solid state circuitry provides accurate and reliable readings with sensitivity as low as 1.5KV phase to ground.

Basic Operation1. Attach the metered probe to a hotstick and connect the BLACK ground lead.

2. Switch the meter to the ON position. The red LED power light will illuminate indicating that battery voltage is sufficient. All other LED indicators will momentarily light up showing that the meter is operating properly.

3. To test for voltage: Touch the metered probe to the test point on the cable

connection. The amber PHASE 1 LED indicator light will illuminate showing that the high voltage circuit is energized.

4. To test for proper phasing: Attach the non-metered probe to an additional hotstick

and connect the RED phase lead from the metered probe to the non-metered probe.

Touch one probe to the test point on one of the cable connections. Touch the other probe to the test point on the other cable connection.

The amber PHASE 1 and PHASE 2 LED indicator lights will illuminate showing that each of the high voltage circuits are energized.

If the circuits are IN PHASE the green LED will illuminate. If the circuits are OUT of PHASE the red LED will illuminate.

Ordering InformationTo order a Phase & Voltage Indicator: Specify Catalog Number PD35. Units are furnished complete with battery, 10-foot test leads, operating instructions and a foam lined carrying case.

PD35

11

ORDERING INFORMATION

TABLE 1 - CATALOG PREFIX

Ordering OverviewElastimold Fault Indicators are available in three mounting styles: Test Point Mount (TPM), Overhead Line Mount (OLM), andUnderground Cable Mount (UCM). To Select a Catalog Number, complete the steps outlined below:Step 1: From TABLE 1, select a catalog prefix based on Mounting Style, Reset Type, and Display Options.Step 2: Select a catalog suffix based on the Application.

Application - General Guidelines for Trip Selection1. All fused taps use LOW trip rating (Suffix - LT).2. For 200 Amp. URD applications, use LOW trip rating (Suffix - LT).3. For 600 Amp. URD applications, use HIGH trip rating (Suffix - HT).4. For overhead bulk feeder applications, use HIGH or LOW trip ratings (whichever is greater than the minimum pickup setting of

the related protection device).

Example: To order a Test Point Mount, Voltage Reset with Flag Display for Low Trip application, specify catalog number TPMVF-LT.

CatalogNumber Description Reset Operation

Voltage Indicator with Neon DisplayV2

Indicator auto-resets to normal after system voltage restoration. Reset requires 5kV minimum voltage to operate. Reset operation time is proportional to system voltage.

Example: at 15kV, reset occurs 30 seconds after system voltage restoration.

Voltage Reset with Flag Display

TPMVF

Voltage Reset with LED Display

TPMVL

Time Reset with LED DisplayTPMTL

Voltage Reset with Flag Display

OLMVF

Voltage Reset with LED DisplayOLMVL

Time Reset with LED DisplayOLMTL

Indicator auto-resets to normal after a four-hour time duration. Indicator may also be manually reset using an FTT test tool.

Indicator auto-resets to normal after system voltage restoration. Reset requires 5kV minimum voltage to operate. Reset operation time is proportional to system voltage.Example: at 15kV, reset occurs 30 seconds after system voltage restoration.

Indicator auto-resets to normal after a four-hour time duration. Indicator may also be manually reset using an FTT test tool.

OVERHEAD LINE MOUNT

Time Reset with LED Display

UCMTL Indicator auto-resets to normal after a four-hour time duration. Indicator may also be manually reset using an FTT test tool.

URD CABLE MOUNT

TEST POINT MOUNT

Indicator auto-resets to normal after system voltage restoration.

AccQTrip™ and AccQClamp™ are trademarks of Quality Indications, Inc.

12

TESTING & ACCESSORIES

Voltage Indicator Test Box Permits field testing of V2 Voltage Indicators and provides assurance that the indicator is properly functioning. The test box is lightweight, portable and self powered by replaceable C-Size batteries. The unit includes a standard Elastimold test point, a push to test button, a green LED operation indicating light and a rugged, impact resistant plastic housing.

Basic Operation1. Mount the Neon Voltage Indicator to the test point provision on

the test box.

2. Push and hold the test button to energize the test point. The green LED light will flash indicating that battery voltage is sufficient and that the test box is operating properly.

3. Continue holding the test button until the Neon Voltage Indicator begins to flash. If flashing does not occur after approximately 30 seconds then the Neon Voltage Indicator is defective and should be discarded.

Ordering InformationTo order a Voltage Indicator Test Box: Specify Catalog Number V2TB. Units are furnished complete with batteries and operating instructions. Overall dimensions are: 5-3/8” wide X 4” high X 2-3/8” deep.

Field Test Tool Permits field testing and reset of fault indicators and provides assurance that the indicator is properly functioning. The test tool is light weight, portable and incorporates a built-in magnet which operates the indicator trip and reset functions. The unit is equipped with provisions for hotstick handling and operation.

Ordering InformationTo order a Field Test Tool: Specify Catalog Number FTT. Overall dimensions are 2” wide x 3” high x 5/8” deep.

13

SPECIFICATION NOTES

14

APPLICATION NOTES

15

©2003 Thomas & Betts

Thomas & Betts CorporationT&B Utility8155 T&B Blvd.Memphis, TN 38125Tel: (800) 888-0211 x5016Fax: ((800)888-0690www.tnb.com

Catalog# PC-V.F. INDICATORS-0903

Protection and Control


fault indicator prod guide - please select a · pdf fileurd cable mounted fault indicators aid...

Documents